Hover or tap underlined Spanish terms to see their translation and exam tip.
Al cruzar la enfilación de los faros de Cabo Espartel y Punta Malabata, marcamos dicha enfilación en demora de aguja 090º. Calcular la corrección total.Crossing the leading line (enfilación) of Cape Spartel and Punta Malabata lighthouses, you observe that alignment at compass bearing 090º. Calculate the total compass error:
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Correct answer: a) ‒10º (minus)
Why it is correct
West of Cape Spartel, the Cape Spartel–Punta Malabata leading line bears 080º true (Dv = 080º). Therefore Ct = Dv − Da = 080º − 090º = −10º.
Why the others are not
- b) Does not match Ct = Dv − Da = 080º − 090º = −10º.
- c) Does not match Ct = Dv − Da = 080º − 090º = −10º.
- d) Does not match Ct = Dv − Da = 080º − 090º = −10º.
How to work it out in the exam
- Measure on the chart the true bearing of the Cape Spartel–Punta Malabata leading line: Dv = 080º.
- Subtract the compass bearing: Ct = 080º − 090º = −10º.
Where this question comes from
- Junta de Andalucía · 2016 · 2ª convocatoria · PER Modelo A · question 44 Official paper · Official answer key
- Junta de Andalucía · 2016 · 2ª convocatoria · PER Modelo B · question 45 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.